body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #1e1e2f, #2a2a40);
    color: #ffffff;
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    position: relative;
    height: 100vh;
    background: url('https://images.gptkong.com/demo/sample1.png') center/cover, linear-gradient(135deg, #3b428f, #7a5ce6);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
}

header h1 {
    font-size: 4rem;
    font-weight: bold;
    z-index: 2;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.5);
}

nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(90deg, #3b428f, #7a5ce6);
    backdrop-filter: blur(10px);
    padding: 10px 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav a {
    color: #fff;
    text-decoration: none;
    margin: 0 10px;
    font-size: 1rem;
    transition: color 0.3s ease-in-out;
}

nav a:hover {
    color: #ffcc00;
}

main {
    padding: 20px;
    max-width: 1400px;
    margin: 0 auto;
}

section {
    margin-bottom: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 20px;
    backdrop-filter: blur(10px);
}

section h2 {
    font-size: 2.5rem;
    color: #ffcc00;
    margin-bottom: 20px;
}

section p {
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 15px;
}

pre {
    background: rgba(0, 0, 0, 0.5);
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-size: 0.9rem;
    color: #ffcc00;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

table th, table td {
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 10px;
    text-align: left;
}

table th {
    background: rgba(0, 0, 0, 0.3);
    color: #ffcc00;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 20px;
    transition: transform 0.3s ease-in-out;
}

.card:hover {
    transform: scale(1.05);
}

.card img {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2.5rem;
    }

    section h2 {
        font-size: 2rem;
    }

    pre {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    nav {
        flex-direction: column;
        align-items: flex-start;
    }

    nav a {
        margin: 5px 0;
    }
}